JPH0570065A - Power unit for hydraulic elevator - Google Patents

Abstract

PURPOSE:To provide a power unit for a hydraulic elevator capable of reducing the noise in a soundproof cover and radiating the heat in the hydraulic power unit. CONSTITUTION:A hydraulic pump 12 sucking and discharging the oil in an oil tank 10, the driving motor 13 of the hydraulic pump 12, and a flow control valve 14 provided on the discharge side of the hydraulic pump 12 are surrounded by a soundproof cover 21, a ventilating/cooling intake port 22 and an exhaust port are provided on the soundproof cover 21, and a vent duct 24 provided with a sound absorbing material on the periphery is fitted to the exhaust port.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hydraulic elevator power unit for activating a driving force of a hydraulic elevator.

[0002]

2. Description of the Related Art Generally, there are two types of hydraulic elevators, a direct type in which a car is directly moved up and down from directly below by a hydraulic jack, and an indirect type in which a car is moved up and down using a hydraulic jack, a sheave, and a rope. There is. Both of these types are equipped with a power unit that drives a hydraulic jack.

FIG. 3 is a schematic diagram of a direct hydraulic elevator, in which a hydraulic jack 2 is erected on the bottom of a hoistway 1 in a building with its cylinder 3 embedded in the bottom, and a car 5 is directly mounted on the plunger 4. Are supported and can be moved up and down in the hoistway 1 along the guide rails 6.
The power unit 7 which is the drive source of the hydraulic jack 2.
Are generally installed in the machine room 8 adjacent to the hoistway 1. This hydraulic elevator power unit 7 is shown in FIG.
And as shown in FIG. 4, the oil tank 10 installed on the pedestal 9
A hydraulic pump 12 for sucking and discharging the oil in the oil tank 10 via a filter 11, a driving electric motor 13 for the hydraulic pump 12, and a flow rate control valve 14 provided on the discharge side of the hydraulic pump 12. , A pipe 15 and a control device 16 connected between this and the cylinder 3 of the hydraulic jack 2.
And so on.

When the car 5 is raised, the hydraulic pump 12 is operated by the control device 16 to cause the oil tank 10 to rise.
The oil inside is sucked through the filter 11, and this is pumped into the cylinder 3 of the hydraulic jack 2 in the hoistway 1 through the pipe 15 while being controlled by the flow rate control valve 14 on the discharge side. As a result, the plunger 4 of the hydraulic jack 2 is raised, and the car 5 above it is pushed up to the target floor. On the other hand, when lowering the car 5, the flow control valve 14 is switched by the control device 16, and the oil in the cylinder 3 of the hydraulic jack 2 is controlled by the control device 16 from the pipe 15 through the flow control valve 14 to control the flow rate. While returning to the inside of the oil tank 10. This is the plunger 4 of the jack 2.
At the same time, the car 5 descends to the destination floor.

In such a hydraulic elevator power unit, when the car 5 is raised, the hydraulic pump 12 is driven to pump the oil in the oil tank 10 into the cylinder 3 of the hydraulic jack 2, and when the car 5 is lowered, the flow control valve 14 is controlled. Since the flow rate of the return oil from the cylinder 3 is appropriately reduced and returned to the oil tank 10, if the car 5 is frequently driven up and down, the temperature of the oil exceeds 60 degrees, which causes many obstacles to the elevator operation control. Therefore, the safety device works and the operation is stopped.

Since it is difficult for the elevator to become unusable, the conventional hydraulic elevator power unit, which is frequently used, is provided with an oil cooling device for cooling the oil in the oil tank 10 as shown in FIG. A radiator (radiator) 17 and a motor-driven fan 18 that ventilates the radiator 17 are installed on the front side of the oil tank 10, and oil in the oil tank 10 is piped (not shown) to the radiator 17. A cooling pump 19 that circulates and supplies it through is installed.

In recent years, a living room is often provided near the machine room 8 and the hoistway 1 from the viewpoint of housing conditions. In such a case, pressure pulsation generated by the hydraulic pump 12 and the flow control valve 14, etc. Can cause noise problems. For this reason, conventionally, an expansion type silencer 20 has been provided which sharply increases the cross-sectional area in the pipe 15 which is an oil passage to reduce pressure pulsation.

Although the silencer 20 is effective in reducing noise due to pressure pulsation in the pipe 15, the machine room 8
There is no effect in reducing noise generated from the driving electric motor 13 and the like. Therefore, the soundproof cover 21 surrounds the lower part of the oil tank 10 around the pedestal 9 to reduce the noise transmitted to the surroundings.

However, if it is surrounded by such a soundproof cover 21, the temperature of the drive motor 13 will rise in the case of a hydraulic elevator which is frequently used. Therefore, in order to prevent this, the soundproof cover 21 is provided with an intake port 22. An exhaust port 23 is provided to ventilate the outside air.

[0010]

In the conventional hydraulic elevator power unit described above, noise in the power unit 7 leaks to the surroundings from the ventilation cooling exhaust port 23 and the intake port 22 provided in the soundproof cover 21, and the soundproof cover 21 is closed. However, there was a problem that the soundproofing effect due to

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a power unit for a hydraulic elevator capable of reducing noise in the soundproof cover and radiating heat in the hydraulic power unit.

[0012]

In order to achieve the above object, a hydraulic elevator power unit according to the present invention comprises a hydraulic pump for sucking and discharging oil in an oil tank, an electric motor for driving the hydraulic pump, and a hydraulic pump. The flow control valve provided on the discharge side of the pump is surrounded by a soundproof cover, and the soundproof cover is provided with an intake port and an exhaust port for ventilation cooling. It is characterized by being attached to the intake port.

[0013]

In the power unit for hydraulic elevator of the present invention having the above-mentioned structure, since the ventilation duct provided with the sound absorbing material on the peripheral surface is attached to the exhaust port or the intake port of the soundproof cover, ventilation cooling inside the soundproof cover is performed as in the conventional case. While securing the noise, it is possible to greatly reduce the noise generated from the electric motor for driving the hydraulic pump from leaking outside from the soundproof cover.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the figure, the same components as those shown in FIGS. 3 and 4 are designated by the same reference numerals to simplify the description.

A power unit 7 which is a hydraulic jack drive source includes an oil tank 10 installed on a pedestal 9 as in the conventional case,
The oil in the oil tank 10 is sucked through the filter 11
The hydraulic pump 12 for discharging, the driving electric motor 13 of the hydraulic pump 12, the flow control valve 14 provided on the discharge side of the hydraulic pump 12, and the flow control valve 14 and the cylinder 3 of the hydraulic jack 2 are connected to each other. It is provided with a connecting pipe 15 and a control device 16. Moreover, the radiator 17 as an oil cooling device, the fan 18 ventilated by this, and the cooling pump 19 which circulates the oil in the oil tank 10 to the radiator 17 are provided.

Further, in order to prevent noise, an expansion type silencer 20 for reducing pressure pulsation in the pipe 15 is installed in the oil tank 1.
The soundproof cover 21 is provided so as to surround the lower mount 9 of the oil tank 10. The soundproof cover 21 is located at the bottom of the frame 9 and has an intake port 22 for cooling ventilation. Soundproof cover 2
An exhaust port 23 is opened at the upper part of the gantry 9 and at the rear position of the cooling pump 19. A ventilation duct 24 is attached to the exhaust port 23.

The ventilation duct 24 has a vertically long cylindrical shape, and is fitted and attached in a state where a substantially lower half of the ventilation duct 24 protrudes inward from the soundproof cover 21.
A sound absorbing material 25 is attached to the inner peripheral surface of the ventilation duct 24. Further, the sound absorbing material 25 is also attached to the outer peripheral surface of the lower half of the ventilation duct 24 protruding into the soundproof cover 21, so that the sound absorbing area of the exhaust duct 24 is increased. The upper open end of the ventilation duct 24 opens near the lower portion of the fan 18, and the ventilation duct 2
The heat rising from No. 4 is forcibly released by the fan 18.

In the hydraulic elevator power unit configured as described above, the driving electric motor 1 is in operation during the movement.
When 3 and the like generate heat, convection occurs in the soundproof cover 21, outside air is sucked into the soundproof cover 21 from the lower intake port 22, and the heated air causes the ventilation duct 2 of the upper exhaust port 23.
It is discharged through 4 inside. As a result, ventilation cooling of devices such as the drive motor 13 can be achieved as in the conventional case. Also,
The fan 18 is located in the vicinity of the upper end of the ventilation duct 24, and the air heated by the fan 18 is forcibly exhausted upward by the fan 18 to more effectively cool the ventilation inside the soundproof cover 21. Will be done.

Further, since the ventilation duct 24 provided in the exhaust port 23 is vertically long and the sound absorbing material 25 is provided on the entire inner peripheral surface, noise of the driving electric motor 13 in the soundproof cover 21 is generated by the ventilation duct 24. It is greatly reduced that the noise is absorbed inside 24 and leaks to the outside. Further, by providing the sound absorbing material 25 also on the outer peripheral surface of the ventilation duct 24, the sound absorbing area is expanded, the noise is further absorbed, and the soundproof effect is improved.

Furthermore, since the lower half of the long ventilation duct 24 is mounted so as to project into the interior of the soundproof cover 21, it is possible to reduce the number of duct portions projecting outward of the pedestal 9, which results in soundproofing and space saving. Can be achieved.

In the above-described embodiment, the exhaust duct 23 is provided with the ventilation duct 24 with a sound absorbing material.
Even if it is attached to No. 2, noise reduction and heat dissipation effects can be obtained. Further, if the ventilation duct 24 as described above is provided at both the exhaust port 23 and the intake port 22, the noise can be further reduced.

[0022]

Since the power unit for hydraulic elevator of the present invention is constructed by attaching the ventilation duct having the sound absorbing material on the peripheral surface to the exhaust port or the intake port, the noise reduction in the soundproof cover and the heat radiation in the power unit are achieved. The effect that can be achieved is obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a hydraulic elevator power unit of the present invention.

FIG. 2 is a partially sectional front view of the entire power unit of the above embodiment.

FIG. 3 is an overall configuration diagram of a hydraulic elevator showing a conventional example.

FIG. 4 is a partially sectional front view of a conventional hydraulic elevator power unit.

[Explanation of symbols]

10 ... Oil tank, 12 ... Oil pump, 13 ... Driving electric motor, 14 ... Flow control valve, 21 ... Soundproof cover, 22 ... Intake port, 23 ... Exhaust port, 24 ... Ventilation duct, 25 ... Sound absorbing material.

Claims (1)

[Claims] 1. A soundproof cover surrounding a hydraulic pump for sucking and discharging oil in an oil tank, a drive motor for the hydraulic pump, and a flow control valve provided on the discharge side of the hydraulic pump, and the soundproof cover. In a hydraulic elevator power unit configured by providing an intake port and an exhaust port for ventilation cooling in the
A power unit for a hydraulic elevator, characterized in that a ventilation duct provided with a sound absorbing material on a peripheral surface is attached to the exhaust port or the intake port.